Computing device for menstruation cycles



June 3, 1941;"

l 5 DMII (NCL-Lil' J. CWIEKALO COMPUTING DEVICE FOR IENSTRUATION CYCLESFiled July 25, 1939 Patented June 3, 1941 UNITED STATES PATENT OFFICECOMPUTING DEVICE FOR MENSTRUATION CYCLES 2 Claims.

This invention relates to new and useful improvements in a computing andrecording device for sterile and fertile sex periods.

It is believed by many members of the medical profession that everyWoman goes through certain sterile and fertile periods during eachmenstrual cycle, and it is the purpose of this invention to provide adevice for computing and recording these periods.

It is the object of this invention to provide a at body having anopening adjacent one end thereof, and upon which a movable member isrotatively mounted and provided with areas in a manner to be selectivelyalignable with said opening.

Still further it is proposed to imprint each of the areas with the nameof a different month in the manner to permit 'the name of the month inwhich the computation is being made to be aligned with the opening.

Another object of this invention is the provision of a circular area onthe front of said flat body and imprinted with 31 equal spaces andconsecutively numbered from 1 to 31 to represent the 31 days of themonth.

Still further it is proposed to provide a disc rotatively supported onthe front face of the body coaxially with said circular area and dividedoff into equal spaces consecutively numbered from 1 to 31 in a manner tobe aligned with the 31 equal spaces of said circular area.

Another object of this invention is the provision of areas on the discadjacent the equal spaces to indicate the days of the sterile andfertile periods of a menstrual cycle of a certain number of days.

Still further it is proposed to provide a means for releasably mountingsaid disc upon said at body in a manner to permit discs having menstrualcycles oi a different number of days to be mounted upon said flat body.

Another object of this invention is the construction of a device asdescribed which is simple and durable and which may be manufactured andsold at a reasonable cost.V

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawing, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part `of this disclosure-Fig. 1 is an elevational view of the computing and recording deviceconstructed in accordance with this invention.

Fig. 2 is a vertical sectional View taken on the line 2 2 of Fig. 1.

Fig. 3 is an elevational view of a different disc adapted to be used inconnection with the device as shown in Fig. 1.

The computing and recording device for sterile and fertile periods,according to this invention, includes a flat body I0 formed of cardboardor other similar material. This flat body is formed adjacent its topwith an opening Illa.

A member II, of circular contour, is movably mounted behind the at bodyIII adjacent the top end thereof. Particularly, this member II isrotatively supported by means of a rivet I2. This rivet I2 extendsthrough the flat body I0 and the member II. The member II is divided offinto a plurality of areas II, namely twelve, each of which is imprintedwith the name of a different month I3. The names of the months I3 are soarranged upon the face of the member II that they will be selectivelyaligned with the opening I0 formed in the flat body I0 as the member isrotated about the rivet I2.

'I'he flat body Ill is further formed with a circular area I4 subdividedinto 3l equal areas I4. Each of the equal areas I4 is consecutivelynumbered from l to 31 to represent the days of the month.

A disc I5 is rotatively supported upon the front face of the flat bodyI0 coaxially of the circular area I4; The disc I5 has an outer areadivided off into 31 equal spaces I5, The equal spaces I5 are alsoconsecutively numbered from 1 to 31 and are adapted to be aligned withthe equal spaces I4 of the circular1 area I4. The disc I5 also has areasadjacent the equal areas I5. The area I5b adjacent the equal areas I5numbered from l to 9, in Fig. 1, is marked the Sterile period. Similarlythe area I5, adjacent the equal areas I5 numbered from 10 to 17, ismarked the Fertile period. The area I5d, adjacent the equal areas I5numbered from 18, to 28 is marked the Sterile period. The equal area I5marked with the number 29 is indicated as being the first day of thenext menstruation. This disc is to be used in connection with amenstruation cycle consisting of 28 days.

In Fig. 3 a disc I5' is shown which is similar to the disc I5 shown inFig. 1 except that it is imprinted to be used in connection with amenstruation cycle consisting of 23 days instead of 28 days. This discI5 is subdivided into a plurality of equal areas I5 consecutivelynumbered from 1 to 31. This disc is further formed with an area I5bb,adjacent the equal areas numbered from 1 to 4, which is marked theSterile period. An area I5, adjacent the equal areas numbered from 5 to12, is marked the Fertile period, and an area Idd, adjacent the equalareas marked from 1 3 to 23, is marked the Sterile period. The equalarea marked 24 is indicated as being the start of the next menstruationperiod. While only two discs are shown it is to be understood that thedevice is to be provided with discs properly imprinted for all of thepossible menstruation cycles of different lengths.

The disc I5 is mounted upon the flat body le in such a manner that itmay be interchanged with the disc I5 or any of the other discs whichmight be supplied to cause the menstruation cycle of the proper numberof days to be placed upon the flat body I to meet the particular needsof the user of the device. The disc I is rotatively supported by meansof a headed stud I6 which extends through the body I0 and the disc I5.The stud I6 has a head Ilia lying immediately adjacent the front face ofthe disc I5 and a head Itib in the back of the flat body II). A springIl is coaxially mounted upon the stud I6 and operates between the backface of the dat body I0 and the adjacent face of the head 5b for urgingthe head IlitL into face contact with the disc I5.

Immediately adjacent the hole in` the disc I5 through which the stud I6extends the disc is formed with a bayonet shaped tab I8. This tab I3 hasa portion i8@ by which it is integrally formed with the disc I5 andalong which it is adapted to be bent out of the plane of the disc I5.The disc I5' is formed with a tab I8 similar to the disc I5.

To inetrchange the discs it is merely necessary to pull outwards on thehead Iiia of the stud I5 to space this head from the adjacent face ofthe disc I5 against the holding action of the spring I1. Then the tab I8is bent out of the plane of the disc I5 forming a space permitting thedisc i5 to be moved to align the enlarged portion Ib of the space Withthe head Isa of the stud. The disc I5 may then be lifted olif `the bodyIl) by passing the head I6a of the stud I6 through the enlarged portionI8b of the space. Then the disc I5 or any of the other discs suppliedwith the device may be engaged upon the body I0 by reversing the aboveprocedure.

The computing and recording of the sterile and fertile periods of themenstruation cycle is done in the following: For the sake ofillustration let us assume that it is the month of February and that theWoman using the device has a 28 day menstruation cycle. Furthermore, letus assume that the first day of the menstruation cycle occurred on thefirst day of February, the disc I5 is moved to align the equal area liamarked 1 with the equal space Ida marked 1. The device will then be setup as shown in Fig. 1, and Will indicate that from the lst of Februaryto the 9th of February the user will be sterile. From the 10th to the17th the user Will be fertile and so on. The 29th day which is the lstof March will start the next menstruation cycle and so on.

It is to be understood lthat disc I5 may have any other readingy matterthereon or some of the reading matter may be eliminated. It may beprinted with the data of Menstruation only.

without any reference to Fortile and Sterile periods.

While I have illustrated and described the preferred embodiments of myinvention, it is to be understood that I do not limit myself to theprecise constructions herein disclosed and the right is reserved to allchanges and modifications coming within the scope of the invention asdenned in the appended claims.

Having thus` described my invention, what I claim as new, and desire tosecure by United States Letters Patent is:

1. A computing and recording device for sterile and fertile periods,comprising a flat body having an opening, a movable member movablymounted behind said body and having areas selectively alignable withsaid opening and each imprinted with the name of diierent month, acircular area on the front of said flat body and imprinted with 31 equalspaces representing 3l days and consecutively numbered from 1 to 3l, anda disc coaxially rotatvely mounted on the iront of said flat body andhaving lan outer area imprinted with equal spaces consecutively numberedfrom 1 to 31 and alignable with said previously mentioned spaces, andareas on said disc adjacent said equal spaces imprinted with sterileperiods yand fertile periods for a menstruation cycle, means forsupporting said disc upon said body so that it may be interchanged withother discs supplied with said device, comprising a stud extendingthrough said disc and flat body, resilient means adjacent the back faceof said body for urging the head of said stud into face contact withsaid disc, and a bayonet shaped tab formed in said disc adjacent theopening in said disc through which said stud extends and bendable out ofthe plane of said dios forming a space through which the head of saidstud may be passed for freeing said disc.

2. A computing and recording device for sterile and fertile periods,comprising a fiat body having an opening, a movable member movablymounted behind said body and having areas selectively alignable withsaid opening and each imprinted with the name of a diierent month, acircular `area on the front of said flat body and imprinted with 31equal spaces representing 31 days and consecutively numbered from 1 to31, and a disc coaxially rotatively mounted on the front of said flatbody and having an outer area imprinted with equal spaces consecutivelynumbered from l to 3l and alignable with said previously mentionedspaces, and; areas on said disc adjacent said equal spaces imprintedwith sterile periods and fertile periods for a menstruation cycle, meansfor supporting said disc upon said body so that it may be interchangcdwith other discs supplied with said device, comprising a stud extendingthrough said disc and flat body, resilient means adjacent the back` faceof said body for urging the head of said stud into face contact withsaid disc, `and a ybayonet shaped tab formed in said disc adjacent theopening in said disc through which said stud extends and bendable out ofthe plane of said disc forming a space through which the head of saidstud may be passed for freeing said disc, said resilient comprising aspring coaxially mounted pon said stud.

JOHN CWIEIQiLO.

